1 NOTE: An error in the 1960 rural population count was discovered after the publication of CPH-2-1 from the 1990 Census. 2  The correct 1960 rural population using the 'Current urban definition' is 54,054,425.
Tyr (-5). Phe (-5). Role in structure: Glycine is a very unique amino acid in that in contains a hydrogen as its side chain (rather than a carbon as is the case in all other amino acids). This means that there is much more conformational flexibility in glycine.
Glycine (Gly) H-. AMINO ACIDS have both an acidic group, in the carboxylic acid, and a basic group, in the amine. Under physiological aqueous conditions a proton transfer from the acid to the base occurs, forming a dipolar ion or zwitterion, because the carboxylic acid is a much stronger acid than is the ammonium ion.